How many lone pairs of electrons are on the indicated oxygen atom?
A) one
B) two
C) three
D) four
E) none

Question

How many lone pairs of electrons are on the indicated oxygen atom? 
A) one 
B) two 
C) three 
D) four 
E) none

Quizplus · Accepted Answer

The indicated oxygen atom has two lone pairs of electrons. It is connected to two hydrogen atoms and two other oxygen atoms, each of which shares one of its valence electrons in a covalent bond. This leaves two pairs of unshared electrons on the oxygen atom, making the answer B, two.

How Many Lone Pairs of Electrons Are on the Indicated